Regulator system



Sept. 15, 1925. 1,553,400

T. SKMMONS REGULATOR 5 Y5 TEM Original Filed May 24. 1921 k WITNESSES: I INVENTOR JHQ MEX Thegdo e Jim/now.

Patented Sept. 15, M25,

UNITED s AT PATENT OFFTQE. Y

THEODORE SIMMONS, OF HOME'WOOD, PENNSYLVANIA, ASSIGNOR 'IQ WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY, A CORPOBIAL'EIIUN OF PENNSYLVANIA,

REGULATOR SYSTEM.

Application filed May 24, 1821, Serial No. 472,162. Renewed June 5, 1925.

To all whom it may cmccr'n.

Be it known that I, THEODORE SIMMONS, a citizen of the United States, and a resident of Homewood, in thecounty of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Regulator Systems, of which the following is a specification.

My invention relates to electric-regulator systems and it has special relation to systems for maintaining a substantially constant voltage upon supply circuits.

Oneobject of my invention is to provide a regulator system that shall bev quickly responsive to compensate for variations of voltage upon a supply circuit and be operative over a wider range of supply-circuit voltage variations than has heretofore been possible in regulators of this type.

Another object of my invention is to provide a regulator system of the above-indicated character that shall embody means for effecting a preliminary regulation or adjustment of the excitation of a dynamo-electric machine, other means for obtaining a final or more minute adjustment of such excitation and means for determining'the operating range of these regulating mediums.

system of this general class is illustratedand described in the application of J. H.'Ashbaugh, Serial No. 456,797, filed March 30, 1921. In brief, the system illustrated therein comprises an alternatingcurrent, generator or a synchronous condenser which is connected to a supply circuit and the field-magnet winding of which is excited by means of an auxiliary generator. A motor-operated rheostat is connected in the circuit between the two machines and is adapted to be adjusted in accordance with variations in the oXciter voltage. This apparatus accomplishes a preliminary control of the exciter voltage. A regulator of the vibrating-contact type, such as the wellknown Tirrill regulator, is also provided or adjusting the voltage of the eXciter in accordance with variations in the supplycircuit voltage.

' in order to determine the range ofoperation of the above-n1cutioned regulating mediums. a resistor is included in circuit with.

the operating winding of the switch for governing the energization of the rheostat motor, which resistor 18 short-circuited by means controlled b the vibrating regulator. In the system 0 the present application, each of the operating elements of the respecwith, the resistors being normally short-circuited. The respective shunt circuits are adapted to be controlled by means of an electromagnet having two movable armatures are connected across. the exciter voltage. Accordingly, the effective values of the resistors in their respective circuits are re ulated by a vibratory electromagnet, which, 1n turn, is controlled by variations in the supply-circuit voltage and energized in accordance with the exciter voltage.

Referring to the drawing, the single figure is a diagrammatic illustration of one form of circuits and apparatus embodying my invention. A main dynamo-electric machine 1, havng an armature 2 and a field-magnet windmg 3,is connected to supply conductors 4t, 5 and 6. Field-magnet winding 3, is adapted to be energized by an auxiliary exciter generator 7 having an armature 8 and a field-magnet winding 9, said field-magnet winding having an adjustable resistor 11 in tive regulators has a resistor in circuit there- 'co-operating therewith, eachof said armaling relays of the vibratory regulator which circuit therewith. Connected in clrcuit between the armature 8 and the field-magnet winding 3 is amotor-operated rheostat 12 comprising a resistor 13 and a pilot motor 11 which controls the movement of a rheostat arm 15 through the illustrated wormgear mechanism 16. The energization of the pilot motor 14 is controlled by a reversing switch 17 in a well-known manner. It will suffice, for an understanding of the present invention, to state that the reversing switch has differential operating coils 18 and 19, the circuits to which are governed by an electromagnetic switch 21 having a contactcarrying arm 22 that is controlled by a movable core armature 23 in accordance with the energization of operating coil 2 1. The coil 24 has a resistor 25 in circuit therewith and -is connected across the terminals of the main tion thereof. The control of the shunt circuit for this resistor will be hereinafter re ferred to.

The illustrated system also includes a vibratory or Tirrill-type regulator of wellknown construction, herein indicated by the reference character 26. The vibratory contact members 27 thereof are adapted to be controlled in accordance with the supply-- circuit voltage, through the connection of the control magnets 28 and 29 with the transformer 31. i

The main contact members 27 control the circuit to operating relays 32 and 33. Relay 33 controls a shunt circuit for a resistor 34, which is connected incircuit with control magnet 29. Relay 32 controls a shunt circuit for the resistor 11, which is connected in circuit with the exciter field-magnet winding' 9. Accordingly, variations in the supply-circuit voltage will cause the resistors 11 and 34 to be respectively short-circuited in a manner to effect the necessary correction to maintain a substantially constant supplycircuit voltage. Inasmuch as the operation of this apparatus is well known, no detailed reference will be made thereto.

The present invention contemplates connecting the winding 35 of an electromagnet 36 in parallel relation to the relays 32 and 33;

(lo-operating with this electromagnet are two armatures 37 and 38. Armature 37 controls contact members 39 which are included in the shunt. circuit for the resistor 25. The armature 38 controls the contact members 41 which are included in a shunt circuit for a resistor 42 that is located in circuit with the operating relays 32 and 33 and, hence, in circuit with the winding 35 of electromagnet 36.

From the preceding description, it will be apparent that any variations in the exitation of the field-magnet winding 3 will vary the energization of winding 24 to move the reversing switch 17, thereby operating the pilot motor 14 in the one or other direction to so move the rheostat arm 15 as to adjust the field excitation, thus maintaining the supply-circuit voltage substantially constant. Obviously, the range of operation of this regulator is limited by the voltage range of winding 24 of the control electromagnet 21. This range is determined by the mean effective value of the resistor 25 which is in circuit with winding 24.

In order to'accomplish the more minute regulation of the main-machine excitation, the vibratory regulator 26 is provided, it

being controlled in accordance with.

:rrations in the supply-circuit voltage. 1 1.3 operating relays of this regulator are connected across the exciter voltage. Obviously, the operating range of the vibratory regulator is limited by the voltage range over which the relays 32 and 33 will respond. In the system of the present application,the operating range is determined by the mean aflect ve value of the resistor 42, which is in circuit with the operating relays.

Accordingly, the two regulators are so.

interconnected in the system that the operating range of the preliminary regulator will combine with the operating range of the A range is extended-by its own control of the shortcircuit for the res'istor'42, which is in .35

circuit with the relays and the energizing coil of the electromagnet 36. This range,

in. turn, is further extended by ,the simultaneous vibratory control of the resistor 25 whichis in circuit with the preliminary regulator'for the exciter voltage.

Consequently, the present system has an exciter voltage that is variable over wide limits'by the action of the motor-operated rheostat and parallel-connected relays that are energized by the exciter voltage. The relays possess means whereby the independent operating range thereof is extended, as well as the operating range of the control for the motor-operated rheostat, and such extension is utilized tofurtherincrease the limits of th exciter voltage. Hence, there is a continually repeating cycle of increased ranges of operation, whereby a: substantially constant supply-circuit voltage may be maintained over extremely wide limits of both main-machine excitation and supply-circuit variations.

Other modifications in the system and ar' rangement and location of parts may be made within the spirit and scope of my invention. and such modifications are intended to be covered by the appended claims I claim as my invention lFThe combination with a dynamo-electric machine, an alternating-current supply circuit therefor. an exciter generator and a motor-operated rheostat in circuit with said generator, and electroresponsive means for controlling the operation of said rheostat and adapted to thereby regulate the exciter voltage, of a vibratory regulator controlled in accordance with variations in the electrical condition of said supply circuit and adapted to also control the exciter voltage, and electroresponsive means governed by said vibratory regulator for determining the range of operation of both of said regulators.

2. In an electrical system, the combination spective shunt circuits for the resistors 25 and 42. The electromagnet 36 operates over the normal range of the relays 32 and 33 and such with a dynamo-electric machine provided with a field winding connected to a supply circuit and a second dynamo-electric machine in circuit with said field winding, of means for maintaining a substantially constant supply-circuit voltage comprising regulating apparatus controlled in accordance with the voltage of the second dynamo-electric machine, a second regulating apparatus controlled in accordance with the supply-circuit voltage, and means controlled by said second regulator for determining the range of operation of both of said regulators.

3. In an electrical system, the combination with a supply circuit, a "d namo-electric machine provided with a old winding connected thereto, and a second dynamo-electric machine connected in circuit with said field winding, of regulating means adapted tomaintain a substantially constant supplycircuit voltage comprising a regulator in circuit with said field winding and controlled in accordance with the voltage thereof and a second regulator governed in accordance with supply-circuit voltage and having a control element energized in accordance with the operation thereof, said regulators being provided with means for determining the range of operation thereof, said means being controlled by one of said regulators.

4. In an electrical system, the combination with a supply circuit, a dynamo-electric machine connected thereto, a field winding therefor and a second dynamo-electric machine connected in circuit with the 'field winding, of regulating means adapted to maintain a substantially constant supplycircuit voltage comprising a regulator in 011'- cuit with said field winding and controlled in accordance with the voltage thereof and a second regulator controlled in accordance with supply-circuit voltage, said first mentioned regulator having its operating range partially controlled by the second-mentioned regulator, and means for independently determining the range of operation of said regulators.

5. In an electrical system, the combination with a supply-circuit, a dynamo-electric machine provided with a field winding connected thereto, and a second dynamo-electric machine connected in circuit with said field winding, of regulating means adapted to maintain a substantially constant supplycircuit voltage comprising a regulator controlled in accordance with the voltage impressed upon said field winding and a second regulator controlled in accordance with supply-circuit voltage, said regulators being interconnected in said system so that the operation of one regulator efiects the operation of the other of said regulators, and means for determining the range of operation of said regulators.

6. In an electrical system, the combination determining the range of operation thereof.

7. In an electrical system, the combination with a dynamo-electric machine provided with a field winding, a supply circuit therefor, and a second dynamo-electric machine connected in circuit with said field winding, of regulating means adapted to maintain a substantially-constant supply-circuit voltage comprising a regulator controlled in accordance with the voltage impressed upon said field winding and a'second regulator controlled in accordance with the supply-circuit voltage, each of said regulators having an independent operating range, said regulators being connected into said system so that the independentoperating ranges are combined to obtain an increased regulating operating range, and means controlled by one of said regulators and adapted to extend said increased operating range.

8. In an electrical system, the tion with a supply circuit, a d namo-electric machine provided with a fiel winding connected thereto, and a second dynamo-electric machine connected with the field winding, of regulating means adapted to maintain a substantially constant supply-circuit voltage comprising a regulator controlled in accordance with the voltage impressed upon said field winding and a second regulator controlled in accordance with supplycircuit voltage, and means for determining the range of operation of said regulators comprising an eleotromagnet having a plurality of armatures (Jo-operating therewith and controlling a circuit to each of said regulators.

9. In an electrical systennthe combination with a supply circuit, a dynamo-electric machine provided with a field winding connected thereto, and a second dynamo-elect-ric machine connected in circuit with said field winding, of regulating means adapted to maintain a substantially constant supplycircuit voltage comprising-a regulator controlled in accordance with the voltage impressed upon said field winding and a second regulator controlled in accordance with supply-circuit voltage, and means for determining the range of operation of said regulators comprising an electro-magnet having two armatures co-operating therewith for respectively controlling circuits to combina- &

said regulators, said electro-magnet being controlled by one of said regulators.

10. In an electrical system, the combination with a supply circuit, a dynamo-electric machine provided with a field winding connected thereto, and a second dynamo-electric machine connected in circuit with said field winding, of means adapted to maintain a substantially constant supply-circuit voltage, said means including a regulator comprising a motor-operated rheostat in circuit with said machines, control apparatus therefor energized in accordance with the voltage impressedupon said field winding, said apparatus having an impedance device in circuit therewith and a shunt circuit for said impedance device, and a second regulator comprising vibratory contact members and operating relays controlled thereby, said relays being connected in circuit with said machines, an impedance device in circuit therewith and a shunt circuit for said impedance device, and an electromagnet in circuit with said operating relays, said electromagnet controlling both of said shunt circuits.

11. The combination with a supply zircuit, a dynamo-electric machine connected thereto, an eXciter generator having an armature and a field-magnet winding for energizing the machine field-magnet winding, regulating means disposed in series relatlon with the generator armature and the machine field-magnet winding, control means therefor connected in circuit with the machine field-magnet winding and an impedancedevice in circuit therewith, of means for varying the excitation of the generator in accordance with the voltage obtaining in the supply circuit, an impedance device in circuit with said varying means. and other means for controlling the values of said impedance devices in the respective circuits.

12. The combination with an alternatingcurrent supply circuit, a synchronous condenser connected thereto, an eXciter generator for energizing the condenser field windmg and having an armature and a field-magnet winding, and a motor-operated rheostat connected in series relation with the genera-- tor, of means for operating said rheostat to control the potential of the condenser field winding, said means comprising an electromagnet controlled in accordance with said potential, vibratory electroresponsive means also adapted tocontrol the potential of said condenser field winding, and an electromagnet goverened by said vibratory means for determining the regulating operating range of each control means.-

13. The combination with a supply circuit, a dynamo-electric machine to be regulated connected thereto and having an armature and a field-magnet winding, means con trolled in accordance with the potential of the field-magnet winding for accomplishing a preliminary regulation of said machine, and vibratory means controlled in accordance with supply-circuit voltage and adapted to accomplish aturther regulation of said machine, each of said regulators having independent operating ranges, of means controlled by one of said regulators for extending the operating range of both of said regulators.

14. The combination with a sup ly circuit, a dynamo-electric machine to lie regulated, connected thereto, means associated with said machine for accomplishing a preliminary regulation thereof, said means comprising an electroresponsive device, a resistor; in circuit therewith, second means adapted to accomplish a further regulation THEODORE SIMMONS 

